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Date: Sun, 28 Jul 2002 02:42:35 +0200
From: Kurt Garloff <garloff@suse.de>
To: Christoph Hellwig <hch@infradead.org>, Alexander Viro <viro@math.psu.edu>,
       Linux SCSI list <linux-scsi@vger.kernel.org>,
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Subject: Re: [PATCH] sd_many done right (1/5)
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Hi Christoph, Al,

On Sat, Jul 27, 2002 at 10:41:19AM +0100, Christoph Hellwig wrote:
> On Sat, Jul 27, 2002 at 12:32:24AM +0200, Kurt Garloff wrote:
> Linus wants this, and he stated that again on the kernel summit. =20

I've not been there :-(

> But to do this porperly (=3D not the EVMS way) it needs preparation. =20
> Al currently does lots of work in that area to make the block drivers
> largely independent of the major number.

So he should port my sd patch to 2.5. All the data it uses is in a per-major
data structure. Currently, in most function it uses the kdev_t passed to fi=
nd
the right pointer. But that's very easy to replace.
Of course, sd still assumes it gets a whole major and not parts of one. Oth=
er-
wise, more splitting would be needed.

> Once the drivers don't need the major number anymore
> internally the only that needs sorting out is userlevel backwards-compati=
nlity.

That takes more effort than the change itself, I guess.

> I'm pretty sure the preparation will be finished for 2.6, also I can't co=
mment
> whether the unified disk major will be done. (Al?)

Would certainly be nice.

Regards,
--=20
Kurt Garloff  <garloff@suse.de>                          Eindhoven, NL
GPG key: See mail header, key servers         Linux kernel development
SuSE Linux AG, Nuernberg, DE                            SCSI, Security

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